Turbine-driven locomotive



@ct. 21 1924. n

F. LJUNGSTROM TURBINE DRIVEN LOCOMOTIVE Filed April 15, 1922 taindifiiculties have always been met with in eliminating such additionalforces that.

binev machinery having 1 provided I with toothed or. great amounts ofPatented @ct. 2i, i924.

rannam nrnnosr n, or Lrnmao-Bnnmn, SWEDEN, Aw-mime W e r srocnnonn,swmnn', a conro rename-harm nocon%orrvn Application filed April 13,

To all whom 2'13 ma y conccm: it known that I, FRnniuK LJUNos'rRiiM,chief engineer, sub'ect of the King'of Sweden,', residing atlliidingo-Bi'evik, Sweden, have invented certain new and useful Im-vprovements in E bins-Driven Locomotives, of which the following is aspecification. In turbine-driven locomotives provided with toothedgearings to reduce the number, of revolutions of the driving machinery,cerare produced by reason of the crank movem ent transmitting power tothe ,driving wheels of the locomotive. Particularly, in, the case oflocomotives provided with a tura very hi h number of revolutions and adouble spe reducin gearing, such ditional forces have exerted verysevere strains on the teeth and turbine arts, in that thertooth'edwheels intended power; become relatively heavyand attain a high energyof gyration at the speeds prevai ing" I in order to avoid thesaiddrawbackaor- Pam lie on: and ll.

cements with j doub dulum suspension of certain shafts in the =.-:ualone haveproved not to be sufficiently efiective.

a present invention relates to an arrangement in turbine-drivenlocomotives gearings to reduce the driving; invention is the number ofrevolutionsof engine, and the "object of the to eliminate theabove-mentioned additional ployed in this case case. If, nl

forces. To produce this result, a meanspreviouslynsed forv similarpurwses is emtoo, such means consistmg in a resilient connection mtweena gear wheel and the shaft thereof, which connection is adapted in anovel way, however, according to the invention. I

Heretofore, in order to produce a soft enx gagent in toothed gearmgs andto elimi hate injurious strains, toothed rims have been used which areresilient with respect to the corresponding axle. However, such gearwheels more resilient rim heretofore have always heen arranged either atthe first or at the last wheel of the gearing. Such an 'arrarnent,however, would cause very considele ineonvenieno'w in the present aresilient toothw rim be sequeniy, it would '0ver, the strains in mountedon the crank axle and of an inter- 1 mediatepinion driving become toogreat, in that the said crank-axlewheel, has a comparatively heavytoothed ,rim at a great radius and consequently a If, on the other 70nected with the shaft By such an arrangentfthe aloove-men- 3 the wheelhavin t 1922. Serial N0. 552,422.

arranged at the first wheel hf the gearing attached to the turbineshaft, the {large 0 w followm after the said wheel would be without resi'ency, and, on the other hand, a ring device arranged at the said wheelW013) the relatively small wheel proper, and, don-. perhaps require to,be

with a damping means also. Morethe teeth of a wheel masses of the providsaid wheel would great energy of gyration. hand, the spring device weredisposed at the last wheel of the ring, that is to say at :the saidcrank-axle-wheel, the forcesto be damped would be enormously great,whereas the movements due riations in the alar velocity would he verysmall, which would only cause chew ing 1n the spring action andexhaustion and wear of the material. Moreover, the means for suspendingthe springs would thenhecome relatively bulky,

frictional paths a greater pressure on the while with smallerwearingsurfaces of the s ring device would be the-result.-' "P For all theabove-mentioned us, the es" toothed rim of one or more intermediatewheels of the toothed gearing is, according to the pment invention,resiliently concarrying the wheel.

while the ohthe said addiproviding the tion. It is oi. means for Y rimwill be as ll as ihle, while simultaneously the p on the wear surfaceswithin the spring arrangement will he djoecome larger than to resiliencyor the va e intermediate e is at- 95,

spring device will be ar- 1% ice the resilient toothed two-large gearwheels 8 and 20 meshing each attained by grammatically gearingarranged'ln a turbine-driven locowheels, whereas Fig i with a pinion 10and 11 ranged on the sh I Tcouplingrods to the driving whe produce in,the ge greatest when one o the shaft 7 is in the position 1 of thegear12, being arranged so as to be a; the wheel. The said forces arethen equala proper.

the turbine and the driving 2 shows an embodiment of the spring deviceproper, viewed from the side, and with part of the outer casmg brokenaway;

1 and 2 denote the drivingwheels which are interconnected by means ofcoupling rods 3 and 4', and connected through connecting rods 5. and 6with the lay shaft 7 rotating slowly in thetoothed gearing. Thisshafthas "the same number of revolutions as the axles on which thedriving wheels 1 and 2 are mounted. Attached to the shaft 7 are motive,between respectively araft 9. Attached to the same shaft 9 are alsolarge gearwhee'ls 12 and 113 meshing each with the pinions 15 and 16'respectivel .mounted on the turbine vshaft 14.1 Thus t e power and themotion is-transmitted from the turbine 17, partly through a gearingreducing the movement and partly through connectinglrodsand es. of theuneven moments exerted Y Z by the movements of theconand on accountofthe '0sci1-- b aaplay'; .oceurrin in the bearings, varying orces' arearing. These. forces are f the cranks attached to' 8, and smallest whenthe cranks. assume the position 19, while .at the same time opposedforces are roduced at the other chank, small var ing rces also occurringin these changes 0 the moment. -All this causes uneven strains in theteeth, and in a gearing wherein large amounts 0 strains may amount tovalues that are injurious to'the gearing. a i pvAccordingto theinvention, these additionali forces are eliminated by the toothed rim 6fan intermediate wheel, for example I fBy reason on the shaft nectingrods, lating movement, and, perhaps,

resilient with respect tothe shaft carrying ized, part1 throughtheresilienc'y and partly by the iction m the spring arrangement In theembodiment shown in 2, wherenumbers of revolutions nected with itsshaft.

in presence 0 in the same characters are used for corresponding parts inFig. 1, the spring arrangement is devised in the following manner. Thegear wheel 12 arranged on the counter-shaft 9 is provided with aresilient toothed rim, the resiliency being attained by means of springblades 21 so arranged that their outer ends 22 are connected'by means ofa bracket 23 with a bolt 24 attached to the toothed rim, while themiddle portion 25 of the springs is connected by means of anotherbracket 28 with a bolt 26 attached to a frame 27( which is rigidlyconnected with the nave ofthe' wheel. On account of this arrangement,the toothed rim of thegear wheel 12 will rotate with respect to the naveof the wheel on varying loads occurrin in the crank. c

t is obvious that spiral springs for in stance could also be used, butthese would only produce an oscillating motion of the toothed rimrelatively of the spring blades shown on account of their own innerfriction.

: Other suspending means for the springs than those above described maybe 'used without departing from the principle of the invention. Theemployment of still another shaft with gear wheels belonging thereto. is

conceivable for a further reductiqn 'of the number ofrevolutions. Insuch a casethe spring device must'be arranged either" in the 'drivinengine, characterizedby the toothed 1 rim'o at least. one intermediatewneel of the toothed earin 2. An'arrangementaccording to claim 1,

ds of, three different v characterized by the ar wheelrunning at anintermediate spee having its toothed rim resiliently conwheels runningat snee Intestimon whereof I-aflix my signature 'two witnesses. FREDRIKLJUNGSTROM. Witnesses: S. Swanson,

to'the nave,-such os- 90 'cillation being damped by the employmentanddesiredtov-secure being resiliently connected with t e sha carryingthe wheel.

f power are transmitted, the said .wheremthe toothed gearing consistsofgear

